A.C. Problem

P.THE HEAT

MEMBER
FORD F-250

2001 ford 4x4 250 5.4 mileage 131549. Having problems with a.C. And heater. When I change from a.C. To heater it blows hot air but, when I switch it back it stills blows hot air. And visa versa with a.C sometimes switch I to heater and blows cold air.

Tuesday, October 23rd, 2007 AT 8:23 PM

3 Replies

2CARPRO JACK

MECHANIC
11,533 POSTS

Does it blow air out of the correct vents?Trying to rule out a vacuum supply problem. Could be a blend door actuator that is sticky or broken and flapping. Located in the HVAC plenum box under dash

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Wednesday, October 24th, 2007 AT 7:46 AM

P.THE HEAT

MEMBER
2 POSTS

It does blow air through the proper vents the only problem is like I said, when using a.C. And I switch to heater it will blow cold air. After awhile messing with the controls that when it will work.
Also with the heater, when I switch back to a.C. It
will blow hot air, and after messing again with the controls for a while I get the a.C. To work properly.

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Wednesday, October 24th, 2007 AT 6:08 PM

2CARPRO JACK

MECHANIC
11,533 POSTS

Watch th eblend door operation when you go from hot to cold, should be able to see th actuator turning when the temp is changed. Just for laughs, see if it works properly with the fan speed on low and then try it on high and get back to me

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Thursday, October 25th, 2007 AT 7:40 AM